Before noon I go to see chum (5)
I believe the answer is:
amigo
'chum' is the definition.
(I've seen this in another clue)
'before noon i go' is the wordplay.
'before noon' becomes 'AM' (as in AM on a clock).
'am'+'i'+'go'='AMIGO'
'to see' is the link.
(Other definitions for amigo that I've seen before include "A Mexican pal" , "Friend in Spanish-speaking areas" , "Friend in Spanish-speaking area" , "friend from Barcelona" , "in a foreign land, my friend?" .)